Composition for removing boiler scale



Patented Nov. 26, 1929 UNITED STATES PATENT OFFICE HANS RATHJE, or BUFFALO, NEW roux COMPOSITION FOR REMOVING BOILER SCALE No Drawing.

250 pounds potatoes 125 pounds cabbage 75 pounds carrots 50 pounds turnips pounds celery 125 pounds caustic soda (76%) 17 pounds kerosene 1 pound graphite and enough Water to bring the mass up to 1000 pbunds.

The ingredients are placed in a suitable cooker and boiled from six to twelve hours 25 at a low pressure'until the solids become dissolved.

- This composition is then fed into the boiler in such quantity as may be necessary (depending upon the condition of the boiler) boiler tubes and wallsin any way. It also has a tendency to stop small leaks in the boiler. 7

I have treated boilers which were covered with mud-and scale to a thickness of more than one-half inch and. have succeeded in eliminating the mud entirely and reducing the scaleto a thickness of less than one-six teenth of an inch in a period of four months.

The scale comes off in flakes and sometimes up 1000 pounds.

Application filed January 12, 1928. Serial No. 246,150.

tubes and strips from twelve to eighteen inches long, leaving the iron clear.

That my compound will not injure the boiler iron I have demonstrated by taking a piece of clean'iron red hot and immersing it in a suitable quantityof my compound, leaving the ironv immersed as much as three} weeks, at the end of which time the iron was removed and found to be darkened slightly but no evidence of rust appeared thereon.

The use of the graphite ingredient in my compound gives to the cleaned surface of the boiler a thin film that tends to prevent boiler scale from again adhering to the surface of the boiler.

I am aware that prior to my invention I various compounds have been suggested for the same purpose but so far as I have been able to learn none of them with which I am familiar have succeeded in producing the result which I have been able to produce by the use of my compound. Most of those compositions used heretofore contain active ingredients which frequently injure the boiler. 1

.From the foregoing description it is thought that my invention will be clear to those skilled in the art.

What I claim is:

A. compound composed of'the following ingredients in substantially the proportions stated and brought into solution by the application ofv heat, to-Wit: 250 pounds potatoes, 125 pounds cabbage, 75 pounds carrots, 50 pounds turnips, 25 pounds celery, 125 pounds caustic soda (76%), 17 pounds kerosene, 1 pound graphite. and enough water to make HANS RATHJ/I'E. 

